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LS1043A QSPI Interface

Question asked by Julien Cavallo on Jan 16, 2020
Latest reply on Jan 17, 2020 by Julien Cavallo

Dear Sir,


I develop a custom board with LS1043A CPU.


I would like to use the QSPI memory interface for booting device.


 I have somes questions about QSPI memory interface of the LS1043A CPU.


1) What is the QSPI memory space limitation in MBytes for the LS1043A CPU ? In the "QorIQ LS1043A Reference Manual" on page 178 System memory map show 512 MB for QuadSPI. 512MB it is the limitation of the entire QSPI space memory ?


2) Stacked QSPI device (two 512Mb die) like the MT25QU01GBBB8E12-0AAT from Micron can work with the LS1043A QSPI Interface ? Because The CPU has two chip select signals, QSPI_A_CS0 (chip select for the first die) and QSPI_A_CS1 (chip select for the second die) and the QSPI MT25QU01GBBB8E12-0AAT memory has only one chip select signal. 


3) If i use the QSPI MT25QU01GBBB8E12-0AAT connected with only one chip select signal (QSPI_A_CS0 signal), can i use the entire QSPI memory space 1Gb or also the first 512Mb die ?  


Thank is you in advance for your reply.


Best regards.